In 1366 Agnes married Count Burkhard V (VIII) of Mansfeld (died c. 1389/1390).

Between 1389 and 1391, Agnes married a second time, to Duke Bogislaw VI of Pomerania (died 1393) in Celle.

Agnes married a third time in Schwerin, on 12/13 February 1396, to Duke Albert III of Mecklenburg (died 1412), who had formerly been king of Sweden.

[1][2] The couple had one son: Albert V (died 1423), who was Duke of Mecklenburg and Schwerin.

Agnes died sometime between 1 August 1430 and 22 December 1434 and was buried in Gadebusch.